Engine and like connecting-rod head.



P. CLERGETr ENGINE AND LIKE CONNECTING ROD HEAD.

APPLICATION FILED OCT. 30,1916- Patented Apr. 9, 1918.

W 4 Wm Attmney.

rmann'onnnsnr, or LEVALLOIS, raancn, ASSIGNOB. T0 socmrn cnnnsn r, arm aY -c1n., or LEVALLOIS, SEINE, raancn.

ENGINE LIKE CONNECTING-ROD HEAD.

. Specification of Letters Patent.

Patented Apr. 9, 1918.

' Application filed October 30. 1916. Serial No. 128.467.

To all whom it may concern:

Be it known that I, PIERRE CLERGET, a citizen of the Republic of France,residing at 37 Rue Cav,Levallois, Seine, in the Republic of France, haveinvented certain new and useful Improvements in. Engines and likeConnecting-Rod Heads, of which the following is a specification. I v

The present invention relates to a construction or arrangement ofconnecting rod heads for motors having inclined or radially arrangedcylinders.

The arrangement is characterized by the fact that the arc of support ofthe connecting rod head on the crank pin of the crank shaft is made aslarge as possible by the use, for each connecting rod, of crossedsuperposed helicoidal guides the ends of which engage, respectively andsyn'nnetrically,with relation to the axis of the connecting rod, inspecial circular grooves which carry the connecting rod and eliminateplay.

By means of the construction or arrangement of guides, hereinafterdescribed, the

ends of the guides are distributed in pairs on either side of theconnecting rod, so that this latter is guided around the axis of thecrank pin under conditions which are such that it cannot sufl er anyrotary movement about its axis such as is'liable to bev produced in thesimilar systems known at the present time. In this arrangement, theconnecting rods are all similar to each other, are equal in dimensionsand of the same weight. Furthermore the corresponding bearing parts ofthe assemblage have the same radii as each other.

A constructional form of this arrangement of mounting connecting rodsisshown by way of example in the accompanying drawing.

Figure 1 is a transverse vertical section showing a single connectingrod mounted in one of the connecting rod carriers.

Fig. 2is a longitudinal section through the axis of the crank shaftbearing.

Fig. 3 is a plan'of the guides.

Fig. 4 shows an example of a connecting rod in which the guides areinclined in the opposite direction to that of the guides shown in Fig.3. I

Fig. 5 is a longitudinal section of a modified construction.

The heads of the connecting rods 1 are of a section tapering toward thecenter of the crank pin, which allows of their being of the saidconnecting rod. These guides form part of portions of crossed helicesdrawn upon cylinders of different diameters, the pitch of one being lefthanded and the 'pitch of the other right handed.

Each pair of guides 2, 3 or 4, 5 of one and the same helix fits into theconcentric circular grooves 6, 7 or 8, 9 made in the crosshead carriers10, 11 mounted upon the crank pin and embracing the guides of all theconnecting rods.

It follows from this arrangement that the alternate right and lefthanded guides are superposed and crossed like an X following the helicesof different pitch.

All the internal and external faces of the guides bear symmetrically ontheir supports at each stage of the movement and the whole of the twopairs of guides crossed X-wise thus furnishes a double symmetricalsupport for each connecting rod.

The two connecting rod carriers 10, 11 are alike and are assembled bymeans of a double conically tapered socket member 12; they are securedin .place by nuts 13, 14 screwed on to the ends of the socket 12 andseated in circular recesses in the said cross head carriers.

Lubrication is effected through holes 15 provided along the common planeof the base of the two cones of the socket 12 and through the gap leftbetween the two connecting rod carriers.

The connecting rods thus arranged are alike, and are the-same distancefrom the center and are capable of moving with the same'latit'ude as ifeach of them possessed only a single pair of guides arranged on the endsof one and the same helicoidal guide.

The arrangements above described are given by way of example only; theforms,

dimensions, constructional details and applications thereof may varywithout depart mg from the essential characteristics of the invention.

In Fig.5 it will be seen that the support is reduced by half by doingaway with the metal ring comprised between two of the concentric groovesof one and the same con-' other than that necessary for the play of thecorresponding guides of the adjacent connecting rods; It is thereforethe interior faces of the interior guides which receive the forces ofcompression, and the external faces of the external guides which efiectthe pull.

. For great strains, the number of guides in each goove may be doubled,concentrically for example and in supplementary grooves, which allows ofa greater number of connecting rods being mounted around one and thesame crank iaim'suficient bearing surface being provided for each ofthem.

The direction of-inclination ofthe'guides is immaterial, the essentialpoint being that all the connecting crank pin be alike.

What I claim and desire to secure by Letters Patent of the' UnitedStates is v 1. Connecting-rod heads for motors having inclined or radialcylinders, each of which is provided with helical crossing superposedprojecting guides, and means for supporting and connecting the guides toa crank pin on which the connecting rods are jonrnaleda 2.Connecting-rod heads for motors having inclined or radial cylinders eachof which is provided. with crossing superposed helical projectingguides, connecting-rodcarrying plates provided with circular slots inwhich the projections of the guides engage, and means for assembling andmount mg the plates on a crank in on which the connecting rods arejourna ed...

In this case, the guides are lmmediately superposed without anyintervalrods of one and the same menace 3,. Connecting-rod heads formotors having inclined or adial cylinders each of which is provided withcrossing superposed helical projecting guides, connecting-rodcarryingplates provided with circular slots in which the projecting guidesengage, an a device having the form of a double trunhated cone for thepurpose of assembling and mounting these plates on a crank pin on whichthe connecting rods are journaled.

4. Connecting-rod heads for motors hav ing inclined or radial cylinderseach vof which is provided with crossing superposed helical projectingguides, two plates arranged on each side of the big ends of the which isprovided with crossing superposed helical guides, two plates arrangedoneach side of the big ends of the connecting-rods and provided withcircular slots for the ,purpose of-supporting the guides, a doubleconical socket member'mounted on a crankv pin on which theconnecting-rods are journaled and on which are mounted the two platesand devices for maintaining the said plates in position on the. doubleconical socket member. I

In testimoriywhereof I aflix my signature in presence 0 'wo witnesses.

PIERRE CLERGET.

Witnesses:

' CHAS, P. PREssLY,

Vision Doron'r.

